Improvement in ferrules for tubular-boilers



D. MATTHEW. PERRULE FOR TUBULAR BOILERS.

No. 65,759. Patented June 11, 1867.

DAVID MATTHEW, OF PRAIRIE DU CHIEN, WISCONSIN.

Letter-s- Patent-1V0. 65,759, dated June 11, 1867.

Elie Srlgehulc rrfcmt in in'flnsg Eiders intuit ant making part of lip 5mm 'Be it known that I, DAVID MATTHEW, of Prairie du Chien, Crawford county, State of Wisconsin, have invented a new and improved Ferrule or Flue-Mouth and Ring,-which prevents the rapid bhrning out and destruction of thcfiue ends and sheet in tubular or flue-boilers, and promotes a better combustion and entrance ofthc combustible gases into the lines; .andI do hereby declare that the following is afull, clear, and exact description thcreof,refcrcnce being had to the accompanying drawings, and to the figures and letters, in which like lettersindieate similar parts. I

Figure 1 is a vertical section on the line a a of fig. 2, showing theflue-sheet A, and end of fiues C, and ferrule or flue-mouth B, and ring D, underneath the ferrule B, to accelerate the gases, compress and consume them as they enter the tines, and to retain luminous or other products between the outersurfaces of the ferrules, the ring D, and the flue-sheet- A, to prevent the burning up of thctflue;sheet.

Figure Tie a front view of the enlarged or trumpet-mouths of 'the ferrules B, and part of the flue-sheet- A and ring I) under the ferrules, with bolt e to secure it to the flue-sheet;

The nature of my invention consists in making theferrules usedto support the ends of the ilues in the furnace end in the flue-sheet in the form of a bell, trumpet, or funnel-shape, enlarging, and so that the large open end B shall protrude out into 'thc furnace, say, one inch, more or less, beyond the flue or tube sheet, with their large ends coming in contact with each other, or nearly so,,having theentrance or mouth made bell,

trumpet, or funnel-shaped, of larger area than that of the flue, with their small ends fitted to the lines, as is the common ferrule. The large cud-extending into the furnace becomes'highly heat 'ed, and-the products of combustion or smoke and-gases coming in contnctj'v'ith these highly-heated enlarged ends, with their tapering mouths, beeoir'c accelerated and concentrated or compressed, and ignite and consume the combustible gases, and produce aavolnm e of flumeinto the tubes or lines, which combustible gases or matter would not otherwise be ignited, but would be condensed and deposifetliusoot by coming in contact with the colder surfaces of the flue-sheet and flues or tubes, they being at a muchlcss degree of heat than the bell-mouths of the ferrules in the furnace or fire. Also, in applying a projecting ring or flange, D, under or around the lower or outer series of ferrules, to form a support or enclosure to the ashes and other matter which are deposited between the ferrules against the flue-sheet and protect it from burning out.

I construct my bell-mouth ferrules 13 of good Scotch or other soft iron, that will stand a strong heat and not crack or fly with lire. The boilers are constructed in any of the usual formsof tubular or flue-boilers, where the flames and heat pass through the fines or tubes, but in order to avoid the rapid destruction of the flue or llll'Hk-Clllltiiuul shectand the waste or escape of the iguitiblc gases, as is' common in the tubular or line-boiler, I make a bell-mouth ferrule, B, say of two inches length, with the small end turned to fit the line C, after it has been put in and mandrelled out to the tube or flue-sheet A, and to thc'taper of the mandrel used to expand the tube or flat, the small end entering and isdrivcuinto the tube or flue one inch, more or less, as is common, while the large end will project out from the tube or fine oneinch, (see fig. 1.) B B are the ferrules, A is the [hie-sheet, and C C the lines. The enlarged mouths of the ferrules coming together, or nearly so, forming a complete screen for the flue-sheet, and the spaces or cavities between the bell-mouth ends and the flue-sheet fill up with luminous ashes, or other products ofeombustion, while the surface thus exposed to the volume of smoke and gasesis at a very high heat, where it is accelerated and compressed or concentrated by thc bell-mouths of the ferrules into the lines or tubes, burning up, and passes'off more rapidly, giving off its volume of heat to the lines or tubes, making the flue surface more cfi'ectivqwhile the large ends of the ferrules form a perfect screen for the flue-sheet and tube or flue ends, with the cavities filled up with a non-conducting material for its proteciiomsupportml and held in place around them by the ring D. I

What I claim as my invention, and desire to secure byLettersPatcnt, is-- l. The projecting ferrules l], constructed and arranged as and for the purpose herein set forth.

I claim the ring ll combined with the projeetingfcrrules in front of thellue-sheet to protect it as set forth.

' DAVID MATTHEW.

witnesses P. -J. Annus, Barnum DUNN. 

